export interface Transmission {
  type: string;
  taskId: string;
  md5: string;
  file: File;
  fileName: string;
  totalSize: number;
  chunkNumber: number;
  chunkSize: number;
  totalChunks: number;
  parentId: string;
  status: number;        // 0 等待 1 进行中 2 成功 3 失败 4 暂停
  uploaded: Array<number>;
}